- half-cycle
- half-degree
- half-disk
- half-exact functor
- half-exact operation
- half form bundle
- half-GCD
- half-group
- half-groupoid
- half-homomorphism
- half-infinite programming
- half-integer
- half-integer weight
- half-integral
- half-interval
- half-interval search
- half-invariant
- half-life
- half-linear
- half-line (= half line)
- half-martingale
- half-module
- half-Moses circle
- half-neighborhood
- half-normal distribution